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Finding the Fourth Proportional to 225,318.25, 310,975.40 and 128,553.67

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Solution

The fourth proportional to 225,318.25, 310,975.40 and 128,553.67 is: 177,424.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,318.25 : 310,975.40 = 128,553.67 : x
  2. Step 2: Convert to fraction form
    225,318.25/310,975.40 = 128,553.67/x
  3. Step 3: Cross multiply
    225,318.25x = 310,975.40 × 128,553.67
  4. Step 4: Simplify right side
    225,318.25x = 39,977,026,752.07
  5. Step 5: Solve for x
    x = 39,977,026,752.07/225,318.25
  6. Step 6: Final answer
    x = 177,424.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.